Apparatus for taking, reproducing, or projecting stereoscopic cinematograph pictures



Aug. 17 1926. 1,596,835

B. O APPARATUS Fon TAKING, nrnonucms, on PRoJEcTmG sTEaoscoPIcCINBIATOGRAPH PICTURES Filed May 19. 1924 Patented Aug. 17, 1926.

UNITED STATES BERTRAM TOM HEWSON, OF LONDON, ENGLAND.

APPARATUS FOR TAKING, REPBODUCING, OR PROJECTING STEREOSCOPIC CINEMATO-GRAPH PICTURES.

Application led May 19, 1924, Serial No. 714,433, and in Great BritainNovember 16, 1923.

This invention has for its objectto provide improved apparatus fortakingstereoscopic cinematograph pictures.

l am aware that in a cameray for stereoscopic purposes it has beenproposed to connect a pair of lens mountings together by a central hingeand to provide pins and angular guiding slots whereby the rear ends ofthe camera are caused to diverge and converge with the focussingmovement and the lens mountings to turn upon their connecting hinge.

IAccording to the present invention the camera or projector comprisesthe combination of a pair of lenses optically paired, tubular mountingsfor said lenses, a spindle having oppositely screwed ends and pivotalconnections to said lens mountings at their rear ends, a base, aplatform sliding backwards and forwards in said base, means foroperatingsaid platform to effect the focussing movement pins extending downwardlyfrom the orward end of said lens mountings, inclined guides forreceiving and guiding said pins and whereby the.lens mountings areautomatically drawn together and moved apart by the operation of thefocussing device. y

lVith the improved apparatus I referably employ one film bearing twopictures arranged side by side or two se arate films.

The accompanying drawing lllustrates aconstruction carried out inaccordance with the present invention.

In the construction shown the relative angular adjustment of the pair oflenses in the horizontal plane necessary to produce superposition of theprojected images is effected automatically with the focussing of thepicture.

The mountings of the lenses 1, 1 are connected to a spindle 3 forangular adjustment at the rear end and the forward ends of the said lensmountings 1, 1 are provided with vertical pivot pins 11 adapted ltoslide in conver in angular slots o1" guides 12 in fixed p at orm 6.`

The lens mountings 1, 1 are connected to the screwed spindle 3 bypivotal pins 5 and.'

The focussing movement imparted to the platform 2'by the spindle 10compels the forward ends of the lens mountings 1, l to converge ordiverge by reason of t-he pins 11 sliding in the angular slots 12, andthus the superposition of the images i's accurately and automaticallyobtained as the picture is focussed without. the necessity of separateadjustment.

By projecting two pictures arranged side by side on one film or on twoseparate'films a picture is yobtained `in stereoscopic relief, and ifone of said pictures is tinted with one primary colour and the otherwith another primary colour a coloured picture in stereoscopic reliefwill be obtained.

lV hat I claim as my invention and desire to secure by Letters Patent isImproved apparatus for taking stereoscopic cinematograph picturescomprising the combination of a pair of lenses optically paired, tubularmountings for said lenses, a spindle having oppositely screwed ends andpivotal connections to said lens mountings at their rear ends, a base, aplatform sliding backwards and forwards in said base, means for.operating said platform to efect the focussing adjustment, pinsextending downwardly from the forward ends of said lens mountings,inclined guides for receiving and guiding said pins and whereby' thelens mountings are automatically drawn together and moved apart by theoperation of the focussing device, substantially as and for the purposesset forth.

BERTRAM TOM HEwsoN.

